Hola. I added the postscreen function to my PostFix server.
I get emails now and lots of spams are blocked by it. In the log is Apr 21 12:33:19 tanzer postfix/postscreen[12944]: connect from unknown[65.181.123.80] And after the email continues to be delivered okay. What is "unknown" in this case? I think it is the RDNS that is not there? host 65.181.123.80 Host 80.123.181.65.in-addr.arpa. not found: 3(NXDOMAIN) I think a good mail server must always have the RDNS, yes? I am not 100% sure that it is safe to reject this. What is the PostFix parameter document to learn how to reject specifically this case right at postscreen?
